package com.example.config;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.stereotype.Component;

@Component
@WebFilter(urlPatterns = "/*", filterName = "CorsFilter")
public class CorsFilter implements Filter {

	@Override
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
			throws IOException, ServletException {
		HttpServletResponse response = (HttpServletResponse) res;
		HttpServletRequest reqs = (HttpServletRequest) req;
		String curOrigin = reqs.getHeader("Origin");
		response.setHeader("Access-Control-Allow-Origin", curOrigin == null ? "true" : curOrigin);
		response.setHeader("Access-Control-Allow-Credentials", "true");
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, PATCH, DELETE, PUT");
		response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
		response.setContentType("application/json;charset=UTF-8");
		chain.doFilter(req, res);
	}

	@Override
	public void init(FilterConfig filterConfig) {
		System.out.println(
				"=======================================================chulaile=================================================");
	}

	@Override
	public void destroy() {
	}

}
